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Near Chaomidian Village (GMC Beijing coll) (Cretaceous of China)

Where: Liaoning, China (41.6° N, 120.8° E: paleocoordinates 44.5° N, 122.3° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Yixian Formation, Early/Lower Aptian (125.5 - 122.5 Ma)

• U-Pb dating suggests that the Sihetun area ranges from 124.9 1.7 Ma to 122.8 1.6 Ma (Yang et al., 2007). Chang et al. (2017) obtained Ar/Ar ages of 125.8 1.0 Ma and 126.0 0.8 Ma from the Lujiatun Unit, the lowest part of the Yixian Formation, below the lacustrine shales.

• group of beds-level stratigraphic resolution

Environment/lithology: lacustrine - large; lithified, tuffaceous mudstone

Size classes: macrofossils, mesofossils

Preservation: adpression

Collection methods: Repository: Geological Museum of China, Beijing

Primary reference: D. Ren. 1995. Insecta. In D. Ren, L.W. Lu, Z.G. Guo, S.A. Ji (eds.), Faunae and stratigraphy of Jurassic-Cretaceous in Beijing and the adjacent areas 47-121 [M. Clapham/M. Clapham] more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 138436: authorized by Matthew Clapham, entered by Matthew Clapham on 18.01.2013, edited by Jered Karr

Creative Commons license: CC BY (attribution)